migration: calculate expected_downtime

We removed the calculation in commit e4ed1541ac9413eac494a03532e34beaf8a7d1c5

Now we add it back.  We need to create dirty_bytes_rate because we
can't include cpu-all.h from migration.c, and there is no other way to
include TARGET_PAGE_SIZE.

Signed-off-by: Juan Quintela <quintela@redhat.com>


Reviewed-by: Orit Wasserman <owasserm@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch_init.c b/arch_init.c
index 8da868b988..8daeafaf5c 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -414,6 +414,7 @@ static void migration_bitmap_sync(void)
     if (end_time > start_time + 1000) {
         s->dirty_pages_rate = num_dirty_pages_period * 1000
             / (end_time - start_time);
+        s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE;
         start_time = end_time;
         num_dirty_pages_period = 0;
     }